Buy our Broadband pyramidal foam absorbers

PU foam based pyramid absorbers 3640

These PU foam based pyramid absorbers are the most popular solution for 3, 5 and 10 m EMC chambers in the market.

Solution for 3, 5 and 10 m EMC chambers in the market

These absorbers are the most popular solution for 3, 5 and 10 m EMC chambers in the market.  Through optimization, this product has a superb performance across 30 MHz to 18 GHz. The foam absorber performs from 30 MHz up to 40GHz and beyond

Prototypes are made and the design is tested. Results become part of a valuable feedback loop for refining our design further.

Broadband Pyramidal Absorber is a low density polyurethane foam, filled with high loss dielectric material in open cell structure and finished with blue paint.

The general base size is 60 cm x 60 cm with 50 mm to 1200 mm height pyramidal. It’s flexible and light weight, can be attached on the wall easily. It is a high performance broadband RF absorber and widely used for Anechoic Chambers.

Characteristics

• Such absorbers have a pyramid-shaped appearance, with blue color (it can be selected as request)
• Pliable and flexible, the pyramids won’t bend in long-term use, and its absorbing properties won’t be changed within 10 years.
• Oxygen index ≥ 29% (GB/T2406-93), which belongs to flame retardant B2 level (GB8624-1997)
• Good environmental performance, all raw materials can meet the environmental requirements, non volatile, no smell and non-toxic.
• Working conditions: general indoor application
  • Long-time working temperature: -50 °C ~ 90 °C
    Short-time working temperature: -100 °C ~ 120 °C
  • Relative humidity: 55% ± 15%
    Frequency range: 30 MHz ~ 110 GHz

Installation method

Generally an environmental protective adhesive is used to paste the absorbers on the shield body (inside of the Faraday cage); when the absorbers’ height is below 500 mm, Velcro installation can be applied; furthermore, we can also adopt the fasteners to install the absorbers, which would facilitate the replacement of absorbers and the relocation of chambers.

Schematic diagram of PU foam based microwave absorbers

Bold items are 98% on stock

Product specification and part numbers

Reflection loss / Shielding performance

Please note:

• For the data below 500 MHz, it is obtained by low-frequency coaxial test method (GJB5239-2004); while for the data above 1 GHz, it is obtained by far-field RCS test method (GJB2038A-2011)
• The performance data listed in the above table is the guaranteed data, and the measured data would be equal to or better than the guaranteed data.
• The bold part number is a stock item and can be delivered immediately
• Certification: CE RoHS